4233165 Original Excavator Screw Plug for ZX200 ZX240-5B ZX270

Part number 4233165 is a specialized part number for Hitachi original excavator plugs. Screw plug is a basic but critical sealing and blocking component widely used in excavators for oil drain holes, process holes, inspection holes or vent holes in engine oil pan, hydraulic oil tank, gearbox, final drive, rotary gearbox and other parts. As an original standard component, it is usually compatible with multiple series of hydraulic excavators from Hitachi, such as the ZX series (such as ZX200, ZX330), EX series (such as EX200, EX300), and earlier models. Due to its strong universality, the same part number may be applicable to different models and parts.

This original screw plug is a standard threaded plug, whose core function is to reliably seal the threaded hole, prevent leakage of lubricating oil, hydraulic oil, gear oil or coolant, and isolate pollutants such as dust and moisture from entering the interior of the box. Its typical structure includes a screw part, a driving head (commonly an inner hexagon, outer hexagon, or square head), and integrated or matched sealing elements. Sealing may be achieved through self sealing with tapered threads, copper gaskets, aluminum gaskets, rubber O-rings, or combination gaskets. As an original component, it is usually made of high-quality carbon steel or alloy steel, and its surface is treated with rust prevention such as galvanizing, phosphating, or Dacromet. It has high mechanical strength, good corrosion resistance, and precise thread tolerances.

The maintenance core of this plug is to regularly check the sealing status, standardize disassembly and assembly operations, and replace it in a timely manner. Regular inspection: During daily maintenance and regular oil replacement, check for any oil leakage at the installation site of the screw plug. If a leak is found, it is necessary to check whether the plug is loose, whether the thread is damaged, or whether the sealing gasket is aged. Standardized disassembly and assembly: When disassembling, use a wrench that matches the size and is in good condition (such as an Allen wrench) to avoid slipping and damaging the plug head. The plug itself has a long lifespan, but the accompanying sealing gasket is a vulnerable part. It is recommended to replace the gasket with a new one after each disassembly.